1 /* 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.oops; 26 27 import sun.jvm.hotspot.debugger.Address; 28 29 /** A DefaultMetadataVisitor implements basic no-op MetadataVisitor 30 functionality except that the setObj() and getObj() methods are 31 implemented properly. */ 32 abstract public class DefaultMetadataVisitor implements MetadataVisitor { 33 private Metadata obj; 34 prologue()35 public void prologue() {} 36 37 // Called after visiting an object epilogue()38 public void epilogue() {} 39 setObj(Metadata obj)40 public void setObj(Metadata obj) { 41 this.obj = obj; 42 } 43 getObj()44 public Metadata getObj() { 45 return obj; 46 } 47 48 // Callback methods for each field type in an object doMetadata(MetadataField field, boolean isVMField)49 abstract public void doMetadata(MetadataField field, boolean isVMField); doOop(OopField field, boolean isVMField)50 public void doOop(OopField field, boolean isVMField) {} doOop(NarrowOopField field, boolean isVMField)51 public void doOop(NarrowOopField field, boolean isVMField) {} doByte(ByteField field, boolean isVMField)52 public void doByte(ByteField field, boolean isVMField) {} doChar(CharField field, boolean isVMField)53 public void doChar(CharField field, boolean isVMField) {} doBoolean(BooleanField field, boolean isVMField)54 public void doBoolean(BooleanField field, boolean isVMField) {} doShort(ShortField field, boolean isVMField)55 public void doShort(ShortField field, boolean isVMField) {} doInt(IntField field, boolean isVMField)56 public void doInt(IntField field, boolean isVMField) {} doLong(LongField field, boolean isVMField)57 public void doLong(LongField field, boolean isVMField) {} doFloat(FloatField field, boolean isVMField)58 public void doFloat(FloatField field, boolean isVMField) {} doDouble(DoubleField field, boolean isVMField)59 public void doDouble(DoubleField field, boolean isVMField) {} doCInt(CIntField field, boolean isVMField)60 public void doCInt(CIntField field, boolean isVMField) {} 61 } 62